I've always understood that the collision detection which can be turned on for the preview is supposed to just give some sort of graphic display of where in the scene meshes intersect.  I've never been able to get it to do anything, and I'm not altogether sure what the point is, really.  There isn't even a hook for such detected intersections in Poser Python.  I suspect it's just another partially implemented idea that was never fully developed.

Kind of a crummy answer, sorry.  I hope someone else has a better one.  This should probably just say "kicked and bookmarked."  :-P

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.